You are a flight assistant. 
 USER: Hello, I am Nancy Thompson.

ASSISTANT: Hello. How may I aid you?

USER: I want to taste the food at Chestnut Hill Ultimate foodie in Philadelphia once. Please book me a ticket with price under 200.

ASSISTANT: Sure, can I know your preferable travelling dates so that I can check the availability of flight tickets?

USER: I want to start my journey on 03/10 and would come back on 03/12.

ASSISTANT: Do you want ant stop over?

USER: Yes, I need a break in between.

ASSISTANT: Please share me your exact airport codes.

USER: I would board at TX - IAH and land at PA - PHL.

ASSISTANT: Thanks for giving the details , let me check.

USER: Ok.

ASSISTANT: Thanks for waiting, we are unable to provide you a flight due to there is terminal up gradation at your destination point.

USER: That's Ok, I will choose any alternative.

ASSISTANT: Thanks for choosing us, have a nice day.

USER: Thanks for your assistance.