You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Kathleen Hall, can you help me to book a flight from LAX to BOS?

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

USER: My travelling dates are 07/27 and 07/29.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

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

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.