You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to book flight ticket from IAH to PHL?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My trip dates are July 29 and July 31.

ASSISTANT: Ok, please share me your name.

USER: Scott Campbell here.

ASSISTANT: Ok, do you have any specifications?

USER: I prefer a connecting flight with economy class which departs at morning and returns at afternoon.

ASSISTANT: Sorry, no flights are available on your route.

USER: It's ok, thank you.

ASSISTANT: Welcome, have a nice day.