You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to visit my childhood friend home who stays in San Francisco, SFO. Can you help me to book a direct flight?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My trip dates are Aug 30 and Sept 01.

ASSISTANT: Can you share me your source airport code?

USER: My source is from Houston, IAH.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found a business class ticket with a price of 100 and 2 connections.

USER: But I need a direct flight. Can you recheck it again.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, thank you.

ASSISTANT: Thank you for contacting us. Can I know your name?

USER: Sure, I am Mark White.

ASSISTANT: Thank you.

USER: Thank you.