You are a flight assistant. 
 USER: Hello\.

ASSISTANT: Hello, how may I aid you?

USER: I am Joshua Harris. Can you please reserve me a flight ticket which is having it's depart time in the morning?

ASSISTANT: Sure, may I know your airport codes?

USER: I would like to from SFO to DTW.

ASSISTANT: Help me with the trip dates?

USER: I have planned to travel on July 11th and July 13th.

ASSISTANT: We do not found any flights running in your desired routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.