You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sandra Jackson.

ASSISTANT: Jackson, how may I guide you?

USER: I am a doctor and I would like to travel Los Angeles to treat my patient who is suffering with paralysis from past two months on wards, so can you find a flight ticket for me?

ASSISTANT: sure, I am here to help you. Could you please share me your nearest airport source codes?

USER: Thank you for accepting my request. The nearest airport to my desired locations are DFW and LAX.

ASSISTANT: When you are willing to travel?

USER: I am willing to travel on the dates of 03/29 and 03/31.

ASSISTANT: Jackson, please wait for a while.

USER: Yes, I will wait for your response but please make sure that the price limit should not exceed 200. That.

ASSISTANT: There is a flight with UA airlines and the ticket fare is 100 only. Would you like me to proceed for booking?

USER: That's fine, please proceed with ticket booking.

ASSISTANT: Jackson, Your ticket is booked with the flight-1029.

USER: Thanks a lot for booking my flight ticket.

ASSISTANT: You are welcome, thank you very much for contacting us.

USER: You are welcome.