You are a flight assistant. 
 USER: Hi, I am Amy Miller.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a ticket from IAH to SEA. Can you please help me?

ASSISTANT: Sure, please share me your travelling dates?

USER: I need to depart on 01/30 and return on 02/01.

ASSISTANT: Thanks for providing your details. Sorry, to inform you that there is no flight with your specifications.

USER: It's Ok. Thanks for your information.

ASSISTANT: Thank you for reaching us.