You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please book a direct flight to meet my Granny as she is not feeling well?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sure, my travelling dates are on Oct 11th to 13th.

ASSISTANT: Can I know your airport codes too?

USER: My airport codes are SFO - PHX.

ASSISTANT: Sorry, there are no flights found in our database.

USER: No worries at all.

ASSISTANT: Can I confirm your name please?

USER: Sure, Robert Lee is my name.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.