You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Elizabeth Lewis.

ASSISTANT: Elizabeth Lewis, how may I render you?

USER: I am going to promote my business at Washington. Can you please help me in reserving the ticket from IAH to IAD?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I am planning my trip on Aug 23 and again I will return back on Aug 25.

ASSISTANT: Which class do you prefer?

USER: My class preference is economy.

ASSISTANT: May I know your connection limit?

USER: I am flexible with direct flight.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait for your response.

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

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

ASSISTANT: Thank you for choosing us.