You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: Can you please book a ticket from HOU to IAD?

ASSISTANT: Sure, can I know your dates?

USER: Sure, here are my travel dates 11/10 and 11/12. My name is Deborah Jones.

ASSISTANT: I am sorry to inform you that there are no flights available on your given dates.

USER: Alright, thank you for the help.

ASSISTANT: Thank you.