You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Helen King here.

ASSISTANT: How may I assist you?

USER: My friend is coming from London to Detroit. I would like to meet him. Can you find any flights available to Detroit?

ASSISTANT: May I know your airport codes for booking?

USER: The airport codes are PHL and DTW respectively.

ASSISTANT: Helen King, what are your planned dates for journey?

USER: I am planning my journey on 05/09 and 05/11.

ASSISTANT: We found a flight for you by UA airlines, can I book it for you?

USER: Please book the ticket if the price is below 500.

ASSISTANT: Flight 1023 is having the price of 200 only.

USER: Please book the ticket.

ASSISTANT: Your booking is confirmed with UA airlines, thanks for reaching ABC agency.

USER: Thank you for your service.

ASSISTANT: Keep reaching us with your future bookings also. Have a nice day.