You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brenda Scott.

ASSISTANT: Scott, how may I help you?

USER: I am planning for a trip from OAK to HOU, can you help me over that?

ASSISTANT: Sure, please provide your itinerary dates.

USER: Sure, my trip dates are 12/24 and 12/26.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: Sorry, no flight is available on your route.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for choosing us.