You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Charles Hill here.

ASSISTANT: How can I assist you Hill?

USER: I want to meet my wife at Oakland, so please book my ticket from Houston.

ASSISTANT: Sure, can I know your travel dates?

USER: My itinerary dates are 05/30 and 06/01.

ASSISTANT: Ok, please mention your airport codes.

USER: My origin and destination airport codes are HOU and OAK.

ASSISTANT: There is a flight 1001 with price 100 for you. Shall I book?

USER: Please book my ticket.

ASSISTANT: Thank you for opting us.

USER: Thank you.