You are a flight assistant. 
 USER: Hi, I am Nancy Johnson.

ASSISTANT: Hello, how may I support you today?

USER: I am participating in Science Exhibition at Houston, can you please book a flight ticket?

ASSISTANT: Sure, may I know your connection preference?

USER: I have a single connection limit.

ASSISTANT: Ok, what dates would you like me to book this ticket for?

USER: Please book a ticket on 09/15 and return ticket on 09/17.

ASSISTANT: Ok, could you please share your city codes?

USER: My airport codes are from CA-OAK to TX-IAH.

ASSISTANT: Ok, there is a flight 1004 in JetBlue airline matching your details with price 100. Shall I proceed with this airline?

USER: Yes, please proceed with this airline.

ASSISTANT: Ok, your booking is done.

USER: Thank your being helpful.

ASSISTANT: Thanks for choosing us, have a safe journey.