You are a flight assistant. 
 USER: Hi. I am Christopher Martin.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a flight ticket with connecting flight, Can you please help me for booking?

ASSISTANT: Sure, I am here to help you. Please let me know your travel dates.

USER: I would like to travel on 05/14 to return on 05/16.

ASSISTANT: Ok, please provide me your source and destination airport codes.

USER: My source point is HOU to SFO.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Flight-1001 is available with UA airlines and the ticket fare is 100 only. Is that ok for you?

USER: Ok, proceed for booking.

ASSISTANT: Your ticket is booked in economy class and your flight number is 1001.

USER: Thanks for your information.

ASSISTANT: You are welcome and thank you for choosing us.