You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to visit the place Children's Museum of Houston, will you book a ticket for me from PHL to HOU?

ASSISTANT: May I know your travelling dates?

USER: My trip dates are from 03/11 and 03/13.

ASSISTANT: Meanwhile, can I know your name?

USER: Sure, I am Cynthia Carter.

ASSISTANT: Sorry Cynthia Carter, no flights are available for your journey.

USER: It's ok, no issues.

ASSISTANT: Thank you for approaching our agency.

USER: Thanks for your concern.

ASSISTANT: Have a nice day.