You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jacob Lewis.

ASSISTANT: How can I assist you today?

USER: I would like to go Washington to meet my friends there, can you please book a flight ticket for me?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I want to take off on 03/27 and please book my return ticket also on 03/29.

ASSISTANT: Please mention your airport codes that you want to travel.

USER: My departure airport is BOS and destination airport is IAD.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: There is no flights found under your requirements.

USER: Oh! So sad to hear that, it's ok I will go with another airline. Thank you for your information.

ASSISTANT: Welcome, have a great day.