You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Gregory Green here.

ASSISTANT: Green, how may I help you?

USER: Reserve a flight ticket from SFO to BOS, can you help me?

ASSISTANT: Please provide your trip dates.

USER: Sure, my trip dates are 03/29 and 03/31.

ASSISTANT: Please hold on for a while.

USER: Ok, carry on.

ASSISTANT: AA airlines with flight 1027 is available.

USER: Please book my ticket.

ASSISTANT: Your ticket is reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.