You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Patrick Thompson.

ASSISTANT: How may I help you?

USER: Can you help me in booking from SFO to DTW, as there is a musical concert to attend at Detroit?

ASSISTANT: Ok, may I know your travelling dates?

USER: My journey dates are 08/20 to 08/22.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available on your preferable dates.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for consulting us.