You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Could you please help me with booking a flight ticket from CLT to SFO?

ASSISTANT: May I know your itinerary dates please?

USER: My itinerary dates are July 29 and July 31.

ASSISTANT:  May I know your preferable journey timings?

USER: I am comfortable with any flight timings.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I prefer a connecting flight in my journey.

ASSISTANT:  May I know your name for the documentation process?

USER: Sure, Joshua Hernandez here.

ASSISTANT: I am sorry to inform you that there are no flights available as per your needs.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Welcome Joshua Hernandez.

USER: Thank you for your service.