You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of assistance you are looking for?

USER: I am Carolyn Turner. Please book a flight ticket from Philadelphia, PHL on 07/15.

ASSISTANT: Sure. When will you catch the return flight?

USER: I will be return on 07/17.

ASSISTANT: How much you can afford for this journey?

USER: I can afford up to 5000.

ASSISTANT: Help me with your destination point.

USER: I want to travel to Houston, HOU.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there were no flights found on your given requirements.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for opting us.