You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: I have to give send off to my friend as he is leaving US and going to India. So, please help me with booking?

ASSISTANT: Sure, May I know the journey codes?

USER: Ok, my journey codes are New York, NY - EWR and Washington DC - IAD.

ASSISTANT: Please help me with your travel dates.

USER: 04/27 and 04/29 are my travel dates.

ASSISTANT: May I know your name?

USER: Elizabeth Campbell is my name.

ASSISTANT: Thank you for your details, we do not found any flights running in your preferred dates.

USER: Ok, no problem. Thanks for the quick response.

ASSISTANT: Thank you for opting us.