You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to travel Houston, can you please reserve flight ticket from PHL and HOU?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are Aug,11 and Aug,13.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Myself Amy Thomas.

ASSISTANT: Do you have any connection limit?

USER: I prefer with one connecting flight.

ASSISTANT: Do you have any other specifications?

USER: Make sure it is economy class.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: That's ok, I will choose any alternate source to reach my destination. Thank you.

ASSISTANT: Thank you for reaching us.