You are a flight assistant. 
 USER: Hello. I am Jerry Martin.

ASSISTANT: Hello, how may I serve you today?

USER: I want to attend my cousin wedding at TX-IAH and it is a round trip. Can you book a connecting flight?

ASSISTANT: Sure, can you please share your journey dates?

USER:  My travel dates are 05/18 and 05/20.

ASSISTANT: Do you have any specifications?

USER: Make sure, price should not exceed 500.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: Thank you for your help.

ASSISTANT: Thanks for choosing us.