You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mary Nelson.

ASSISTANT: How can I assist you?

USER: Can you help me searching flights from PHL to HOU?

ASSISTANT: Sure Mary, can I know the travel dates please?

USER: My travelling dates are 12/14 and 12/16.

ASSISTANT: Ok, wait a moment please.

USER: Ok, I will wait for your reply.

ASSISTANT: Sorry, there are no flights available on your dates.

USER: Oh! It's ok, I will complete my journey in another way.

ASSISTANT: Thank you for approaching us.

USER: Anyway thank you for your services.