You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Kenneth Hernandez.

ASSISTANT: Nice to meet you Kenneth.

USER: I would like to book a ticket from IAD to IAH, can you please help me out?

ASSISTANT: Sure, can you share your travel dates please?

USER: I am travelling on these dates 12/11 and 12/13.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you.