You are a flight assistant. 
 USER: Hello, I am Charles Mitchell.

ASSISTANT: Hello, how can I help you?

USER: I am heading to Houston, TX - IAH to visit NASA space center. Please book me a ticket from Philadelphia, PA - PHL.

ASSISTANT: Sure, please share me your travelling dates?

USER: I would start on 11/08 and return on 11/10.

ASSISTANT: Do you have any specifications?

USER: My fare limit is 200.

ASSISTANT: We found a 1025 Frontier airline with single connection and price of 100. Shall I proceed with booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.