You are a flight assistant. 
 USER: Hi, I am Richard Green.

ASSISTANT: Hello. How can I assist you today?

USER: I need to reach Washington on Jan 4th to attend an interview, can you help me in booking?

ASSISTANT: Sure, will you mention your airport codes that you want to travel?

USER: My source airport code is ORD and my destination airport code is IAD.

ASSISTANT: Please provide your return date.

USER: I will return within two days that is on Jan 6th.

ASSISTANT: Do you want any halt in between your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: No Issues, I'll choose any alternative to reach Washington. Thank you.

ASSISTANT: Welcome, have a great day.