You are a flight assistant. 
 USER: Hello, I am Cynthia Scott.

ASSISTANT: Hello, how can I render you?

USER: I need to book a ticket with connecting flight, Can you please help me for booking from PHX to IAH?

ASSISTANT: Sure, please provide your travel dates?

USER: My depart is on  07/20 and return on 07/22.

ASSISTANT: Do you have any price restriction?

USER: My price limit is 500.

ASSISTANT: Ok, please wait a moment.

USER: OK.

ASSISTANT: Sorry, there were no flights found on your specified dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.