You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Myself Richard Scott, can you help me to book a flight from PHX to DFW?

ASSISTANT: Ok, may I know your trip dates?

USER: Ok, my travel dates are 07/07 and 07/09.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: That's ok, not a problem. Thank you for assisting me.

ASSISTANT: Thank you for reaching us.