You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking my flight ticket from PHL to IAH?

ASSISTANT: Sure, please share your itinerary dates.

USER: My planned travel dates are Jan, 30 and Feb, 1.

ASSISTANT: Do you have any preferences?

USER: I need to travel in connecting flight with economy class.

ASSISTANT: May I know your name?

USER: Richard Garcia here.

ASSISTANT: Sorry Richard Garcia, no flight is available as per your requirements.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.