You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Charles  Hill here.

ASSISTANT: Charles, how may I help you?

USER: Can you please help me in booking a flight ticket from OAK to HOU locations?

ASSISTANT: Sure, please provide your trip dates.

USER: Ok, my trip dates are 05/27 and 05/29.

ASSISTANT: Please hold on. AA airlines with flight 1007 is available.

USER: Ok, please book this ticket for me.

ASSISTANT: Your ticket is booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.