You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, can you please tell me how can I assist you?

USER: I am Rachel Thomas. I would like to travel from SEA to DFW, can you help me to book a flight?

ASSISTANT: May I know your preferable dates?

USER: My travelling dates are 03/12 and 03/14.

ASSISTANT: Sorry, no flights found with your dates?

USER: That is fine. Thank you for your time.

ASSISTANT: Most welcome.