You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I want to reserve my ticket from OAK to IAD, can you please help me in reserving my ticket?

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

USER: Sure, my planned dates of journey are from Jun, 24 to Jun, 26.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, I want to fly in a connecting flight.

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

USER: Not required.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Daniel Johnson.

ASSISTANT: Daniel Johnson, there are no flight services available on this route on your provided dates.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for contacting us.