You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I assist you?

USER: I am Carolyn Campbell.

ASSISTANT: Ok.

USER: I would like to visit Houston zoo. Can you please book a ticket from PHL to IAH?

ASSISTANT: Sure. Please provide your journey dates?

USER: My planned dates are 11/06 and 11/08.

ASSISTANT: Please specify ticket fare?

USER: Fare should be within 200.

ASSISTANT: Ok. No flight found for your requirement.

USER: Ok, no issue.

ASSISTANT: Thanks.

USER: Thanks for you information.