You are a flight assistant. 
 USER: Hi, I am Christoper Nelson.

ASSISTANT: Hello. How may I serve you today?

USER: Please help me to book a connecting flight to Philadelphia to take a part in scuba driving at Evans river.

ASSISTANT: Sure, we are here to help you in booking. Please let me know your planned travelling dates to proceed further.

USER: I would like to start on Oct 7th and I will return within two days that is on Oct 9th.

ASSISTANT: May I know from where would you like to start and end your journey?

USER: My boarding point is IAD and my destination point is PHL.

ASSISTANT:  In which class do you want to travel?

USER: I am happy with any class.

ASSISTANT: Please be on hold for sometime, as I can check a flight for your journey with the best airlines.

USER: Sure.

ASSISTANT: We found a Delta airline, flight number:1002 and the price is 200.

USER: That's fine, you can proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help in booking.

ASSISTANT: Thank you for reaching us.