You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Deborah Collins.

ASSISTANT: In which way I can help you at this moment?

USER: I need to schedule my trip to visit San Francisco. Can you please help me in reserving the ticket from IAH to SFO?

ASSISTANT: Sure, I will aid you with that. Could you please mention your preferable travel dates?

USER: I am planning my trip on July 5, and again I will return back on July 7.

ASSISTANT: Do you have any preferences regarding timings of your journey?

USER: My depart time is morning.

ASSISTANT: Are you okay with connecting flight or you need any direct flight?

USER: I am looking for direct flight.

ASSISTANT: Do you have any another specifications?

USER: My class preference is economy.

ASSISTANT: Ok, please hold on a moment, I will check flight availability in this route.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Not a big issue, anyhow thank you very much for your service.

ASSISTANT: Thank you for contacting us.