You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sarah Evans here.

ASSISTANT: How may I assist you?

USER: I want to attend my son's convocation ceremony, so please book my ticket from PHL to IAH.

ASSISTANT: Sure, I will help you. Can I have your planned travel dates please?

USER: My itinerary dates are Aug 12 and Aug 14.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Sarah Evans, no flights has been found on your planned travel dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.