You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Lisa Lewis here.

ASSISTANT: How can I aid you?

USER: Reserve a flight ticket for me that is for my airport codes IAH to SEA. I need a connecting flight.

ASSISTANT: Sure, can you please give your preferable travelling dates?

USER: My travelling dates for journey are 10/08 to 10/10.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, to say you there are no flights available on your preferable travelling dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for approaching us.