You are a flight assistant. 
 USER: Hello. I am Michelle Hill. I am planning to start a gym at.

ASSISTANT: Hello, how may I render you today?

USER: Help me in booking my flight ticket from PA-PHL to TX-IAH.

ASSISTANT: Sure, can you please mention your price limit for this journey?

USER: My price limit is 200.

ASSISTANT: May I know on which dates you prefer to travel?

USER: My planned travelling dates will be 06/01 to 06/03.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, no flights were found based on your schedule.

USER: Its ok, thank you for your response.

ASSISTANT: Thank you for choosing us.