You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Elizabeth  Moore here. I want to visit my parents for career consultancy after my graduation, can you help me?

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travelling dates will be from 03/13 to 03/15.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My desired airport codes will be from IAH to SEA.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Ok, I will be waiting for your response.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Oh! That's very sad to know, thank you for checking anyways.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.