You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mark Phillips.

ASSISTANT: What kind of help are you expecting from us?

USER: I want to book  a flight ticket from Washington, DC-IAD to Minneapolis & St.Paul , MN-MSP to meet my elder brother. Can you please help me with booking a plane ticket?

ASSISTANT: Sure, let me know your planned travelling dates?

USER: Ok, I want to depart on 10/07 and arrival on 10/09.

ASSISTANT: Do you need a halt with in your journey?

USER: Yes, I need a break in between the journey.

ASSISTANT: Thank you for proving your details, currently all fights are busy with the given route.

USER: No problem, I will choose another alternative to reach my destination.

ASSISTANT: Hope we serve you next time. Thank you.

USER: Thank you for the information.