You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Michael Smith, can you help me to book a flight from OAK with 1 connection?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: My trip dates are 07/29 and 07/31.

ASSISTANT: Ok, may I know your destination airport code?

USER: My preferred airport code is DFW.

ASSISTANT: Do you have any specifications?

USER: Please book a morning flight on my departure date. I need an economy class ticket.

ASSISTANT: Sorry, no flights are available on your route with your requested time.

USER: No issues, thank you for your time.

ASSISTANT: Welcome, have a nice day.