You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Benjamin Lopez here.

ASSISTANT: How can I aid you?

USER: Reserve a flight ticket for me that is from IAH to SEA.

ASSISTANT: Sure, help me with your travelling dates.

USER: My preferable dates for travel are 02/06 to 02/08.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for contacting us.