You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Daniel Johnson.

ASSISTANT: How can I assist you at this moment?

USER: I want to book a flight from IAD to PHX, can you please help?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: I will be travelling on June 8th and 10th.

ASSISTANT: Do you need any halt in this journey?

USER: Yes.

ASSISTANT: Do you have any other specification for this trip?

USER: No, I don't have.

ASSISTANT: Daniel Johnson, we regret to inform you that there are no flight services available on this route on your provided dates.

USER: Not an issue, thank you anyway.

ASSISTANT: Thank you for contacting us.