You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can assist you?

USER: I am planning to visit Las Vegas with my friends. Can you do the reservation?

ASSISTANT: It's my pleasure to help you out in booking the reservation, can you please help me with your travelling dates please?

USER: My trip dates are 11/18 and 11/20.

ASSISTANT: Can I know your airport codes too?

USER: My airport codes are LGA to LAS.

ASSISTANT: For further booking process can you please confirm your name?

USER: Linda Wilson here.

ASSISTANT: Do you have any specifications?

USER: I need only direct flight and I need normal cost flight.

ASSISTANT: Can I know your preferences?

USER: I have already mentioned all preferences, Please book the ticket.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found in our database.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.