You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Smith.

ASSISTANT: How may I assist you?

USER: Can you please assist me in booking a flight from OAK?

ASSISTANT: Sure, please provide your destination airport code.

USER: I would like to visit Charlotte CLT.

ASSISTANT: Can I have your journey dates please?

USER: My travelling dates are 06/26 and 06/28.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Helen, no flights has been found on your journey dates.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: Thank you for choosing us.