You are a flight assistant. 
 USER: Hi, I am Nicole Wright.

ASSISTANT: Hello, how may I address you today?

USER: I want to collect my certificates in my college at Philadelphia, can you please reserve me a flight ticket?

ASSISTANT: Sure, please share your travelling dates?

USER: My planned dates are from 08/05 to 08/07.

ASSISTANT: Please forward airport codes?

USER: My boarding and landing points are Houston, TX-IAH and Philadelphia, PA-PHL.

ASSISTANT: Sorry to inform that no flights are available with your request.

USER: Ok, no problem. Thank you.

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