You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Campbell.

ASSISTANT: How can I assist you?

USER: Can you help me to book a flight from HOU to OAK?

ASSISTANT: Sure Sandra, can I know the travel dates please?

USER: My travelling dates are 03/08 and 03/10.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: Sorry, there are no flights available on your dates.

USER: Ok, no issues, thank you for your help.

ASSISTANT: Thank you for approaching us.