You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I need to book a flight ticket from IAH to DFW, can you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my journey dates are Jun 7 and Jun 9.

ASSISTANT: Please share me your name.

USER: Sure, Nancy Smith here.

ASSISTANT: Do you have any specifications?

USER: I preferred maximum one connection.

ASSISTANT: Sorry, there is no flight at this moment.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you.