You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sandra Wright here.

ASSISTANT: Sandra, how may I help you?

USER: I would like to book a ticket from OAK to HOU, can you please help me with that?

ASSISTANT: Sure, please provide your itinerary dates.

USER: The travel dates are from 08/27 to 08/29.

ASSISTANT: Please hold on for a while.

USER: Ok.

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

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.