You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Virginia Roberts.

ASSISTANT: How may I help you?

USER: Can you help me in booking my flight ticket to OAK from DTW to meet my family?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you for your kind response, my travelling dates are Feb 21 and Feb 23.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Not a problem, I will try with another resource to complete my trip. Anyways thank you for the information.

ASSISTANT: Thank you for reaching us.