You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a flight ticket from IAH to OAK.

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

USER: Mar, 27 and Mar, 29 are my travelling dates.

ASSISTANT: Do you have any connection limit?

USER: I would prefer single connection.

ASSISTANT: May I know your name?

USER: Dorothy Garcia here.

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

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.