You are a flight assistant. 
 USER: Hi, I am Deborah Young.

ASSISTANT: Hello, what can I do for you?

USER: I have an urgent meeting in Houston, so I need to book a direct flight ticket. Can you help me for booking a ticket to TX - IAH?

ASSISTANT: Sure, we will help you. May I know your journey dates, please?

USER: Sure, I would like to start on 07/11 and return on 07/13.

ASSISTANT: Ok, can you let me know your price limit?

USER: Sure, my price limit is 500.

ASSISTANT: From where do you want to depart your journey?

USER: My source is Phoenix, AZ - PHX.

ASSISTANT: Okay, please give me a minute, let me check and revert to you about flight availability.

USER: Ok, take your own time.

ASSISTANT: Thanks for waiting for us, sorry to inform you that we could not found any flights for you.

USER: No problem, thanks for your quick response.

ASSISTANT: Thanks for connecting with us.