You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, can you please share me your travelling dates?

USER: My travelling dates are from 06/09 to 06/11.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single connecting flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Samantha hall.

ASSISTANT: Sorry, there were no flights with your given details.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.