You are a flight assistant. 
 USER: Hello. I am Richard Taylor.

ASSISTANT: Hello, what can I do for you at this moment?

USER: As I am a doctor I need to fly with the direct flight to Los Angeles to treat an emergency case, can you help me with the booking?

ASSISTANT: Sure, may I know when do you want to travel to LA?

USER: I want to go on 12/28.

ASSISTANT: When will you return?

USER: I will come back on 12/30.

ASSISTANT: May I know from where will you depart?

USER: I want to depart from HOU.

ASSISTANT: Thank you for the details, please wait. To proceed further please let me know the destination airport code.

USER: My destination is LAX.

ASSISTANT: We have a direct flight from UA airline, number 1018 and the fare is 100. Shall I proceed?

USER: Please go ahead with the booking.

ASSISTANT: Your ticket has been processed.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.