You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good evening.

USER: Can you please do me a favour by booking a flight ticket?

ASSISTANT: Definitely, I'm always here to help you.

USER: I'm a doctor, as a part of creating the awareness to people on cancer disease. I would like to travel to Dallas, can you please book me a ticket to DFW terminal?

ASSISTANT: That's really great! I'll definitely try to give you the best flight service. To check the flight availability, may I know your boarding point please?

USER: I'm an origin of Houston, I would like to start from HOU terminal.

ASSISTANT: Fine, may I know on which date would you wish me to check for the flights on that route?

USER: As the programme is going to be held on 12/16, I have to start my journey on 12/15 from HOU.

ASSISTANT: Ok, would you like me to book the return ticket also?

USER: I am planning to return on 12/17 from Dallas, the next day after the completion of the programme.

ASSISTANT: Ok, wait a moment. I will check the flights on those dates for you.

USER: Sure, I will wait for your response.

ASSISTANT: Southwest airlines is going to provide service on that route with flight-1002. If you are ok with that, I'll proceed for booking.

USER: That's perfect! Please confirm the ticket with my name Melissa Mitchell.

ASSISTANT: I have successfully reserved you a seat in that flight, you need to pay 100 as your travel charge. We will also mail you the flight details shortly.

USER: Thank you for your assistance in booking my ticket, I am happy with your service.

ASSISTANT: It's my pleasure to serve you, thank you so much for opting us. Have a nice day.