You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Mitchell.

ASSISTANT: How can I assist you?

USER: I would like to book a ticket from DTW to SEA, can you help me?

ASSISTANT: Sure, may I know your planned trip dates please?

USER: My travel dates are 02/16 and 02/18.

ASSISTANT: There are no flights available at this moment.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us.