You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER:  As I am a traveller, I would like to go for a long tour, at Houston. Can you help me to book a flight ticket within 5000?

ASSISTANT: Sure, may I know your journey dates?

USER: I want to fly on 03/04 and return at 03/06.

ASSISTANT: May I know your name please?

USER: I am Margaret Garcia.

ASSISTANT: Can you please provide me your source and destination airport codes?

USER: My source and destination are: PHX and IAH.

ASSISTANT: May I know your connections limit?

USER: I need a connection in between my journey.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry, there is no connecting flights available with your given details.

USER: Ok, no problem. Thanks for your quick response.

ASSISTANT: Thanks for choosing us.