You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Emma Smith. I would like to attend my friend's marriage in Houston, can you please help me in booking a ticket?

ASSISTANT: Sure.

USER: The airport codes are IAD and IAH.

ASSISTANT: Please provide me the dates of journey.

USER: My preferable dates are 03/09 and 03/11.

ASSISTANT: Wait a minute.

USER: Please make sure that connection should be 0.

ASSISTANT: Sorry, there is no flight found.

USER: It's ok.

ASSISTANT: Thank you.

USER: Thank you for your time.