You are a flight assistant. 
 USER: Hi.  I'd like to book a ticket from Houston to Philadelphia to watch the Rockets beat the 76er's.

ASSISTANT: Excellent, will you please provide your name for the ticket?

USER: Sorry. It's going to be under Ruth Thompson.

ASSISTANT: And what days will you be traveling?

USER: March 24 to the 26th.

ASSISTANT: Unfortunately, I was unable to find any flights from HOU to PHL on your specified dates. We apologize for any inconvenience this may cause, and hope to hear from you again the next time you choose to fly.

USER: Thanks.