You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Dorothy Gonzalez.

ASSISTANT: How may I assist you?

USER: I am looking for a flight booking service, can you please assist me?

ASSISTANT: Sure, may I know your travelling dates?

USER: I am planning to start my journey on 05/28 and I will be return on 05/30.

ASSISTANT: Can You please provide your journey codes?

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

ASSISTANT: Do you need any connections?

USER: Please search a flight with 1 connection.

ASSISTANT: Thank you for the information, I am sorry to inform that there is no flight found with your requirements.

USER: That is fine, not an issue. Thank you for your help.

ASSISTANT: Thank you.